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Ryan33
Dodge Dakota
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2/03/2003
14:08:43
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 Subject: Racing...
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Everyone says that it depends on the ability of the driver as to what you can get in the 1/4 mile. When running an automatic transmisison how does the driver matter?? Don't you just slam the pedel to the floor and the truck goes on its own?? How does the driver affect the times? What are some tips for racing with our trucks that could help lower times??
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Manny tranny
Dodge Dakota
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2/03/2003
14:27:01
|  RE: Racing...
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OH yea, that's why ALL automatics run exactly the same time!
Just slam the pedal down dude!
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ME 111
R/T
2/03/2003
16:45:46
| RE: Racing...
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For a more useful response, read on...
It's all about the shift points. By default, they are pre-programmed into your computer at a set rpm and may not be optimally set(In fact, I guarantee it's not). For us with Autos, it would be best for us to manually shift through the gears but knowing at what optimal rpm to shift is a trial and error thing. Dyno runs would help be it mechanical or buttwise. You can tell when you are no longer pulling well and you should shift just before that sensation. Take notes on your runs as to when you feel you should shift and adjust from there. Mods being done will affect this depending on what degree of mods you do. For example, if you were to go with an M1 Intake Manifold...you will realize your power band increasing in rpms so adjust for that. I could and probly someone else will elaborate even more on this but you should get the jest of it.
Flame Red '99 R/T CC
52mm TB - HomeBrewed K&N Intake, 3923 AutoLites, Taylor 8mm wires, TPS @.73 , 180 TStat , Falken 285/60/R17s on Rear, RoadMaster Active Suspension, SS rollpan, XTang soft Tonneau, Mopar Bra
And one Heavy Foot
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Buddy Jones
Dodge Dakota
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2/03/2003
18:58:11
| RE: Racing...
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On my truck, when I manually shift it keeps on pulling through the rpms and will lag before it shifts.
Better ex.: If I shift at 4800 going from second to third, it'll pull all the way to 5100 before it'll go to third.Lots of auto. Dodge transmissions will do this.
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Jim
Dodge Dakota
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2/03/2003
20:36:59
| RE: Racing...
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I used to manually shift my truck and I noticed just a 1 to 2 tenth difference in my 1/4 mile times, I stopped doing this because I blew the rear seal in my transmission so I stopped shifting like that and I just pussy foot the throttle now and it has been working for me..I get about the same times.
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HSKR
Dodge Dakota
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2/03/2003
21:32:05
| RE: Racing...
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Jim, if you blew the rear seal in the tranny, it was probably fomr driveline vibration, not manually shifting the tranny.
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Manual
Dodge Dakota
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2/04/2003
09:27:30
| RE: Racing...
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NO guys, it's like Ryan33 says:
the driver doesn't matter! You're fooling yourself! just floor it-you know, pedal to the metal!
IN fact, use a remote control system, save on the driver weight!
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91DakotaFreak
Dodge Dakota
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2/04/2003
10:20:53
| RE: Racing...
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another way i have found makes an auto shift faster is when you manually shift it let off the gas then slam it back to the floor it will shift into gear like a shift kit if you have it in dirve do the same but you only can guess when you do that
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IntenseDak39
*GenIII*
2/04/2003
10:22:31
| RE: Racing...
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well, go to a track and slam the gas down and see what happens. More than likely you will have a bad reaction time, severe tire spin, bad 60 ft time and then your 1/4 mile will reflect all of that.
When i was using the nitrous, i had my left foot on the brake and the other on the gas and holding the rpms at about 1700 (right before the tire breaks loose) and i would let go of the brake on the second yellow and floor it... then when i went to about 2200-2500 rpms, i would activate the nitrous and there came my traction issues... darn open diff. I had the best times when letting the tranny do the shifting for me. Now i have a shift kit and a ratchet shifter and have got my reaction times in the .5s and my 1/8th mile times stay within .1 out of about 10 pulls. Now i have more adequate power and i am gonna see what i can do on the 15th at texas raceway.
Turbocharged V6
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Demon-Xanth
Dodge Dakota
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2/04/2003
14:02:00
| RE: Racing...
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I have a stick now, but my last car was an auto, and I can easily say that the driver can make a huge difference. Even though it was a 3400Lb Grand Prix w/ a 3.1 V6 driving the front wheels, just mashing the gas would shock the tires and spin them. The best acceleration was from brake torquing it, and slowly releasing the brake on launch. This kept the power to the ground at the threashold of breaking while the engine stayed up on the power curve.
Just like dumping the clutch on a manual doesn't always get you to the end faster. (it just turns my Dak into a smoke machine)
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Jeremy
Dodge Dakota
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2/04/2003
14:07:22
| RE: Racing...
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For 91 DakotaFreak.....how does letting of the gas pedal increase your et's? Lets not forget what were doing here. The quickest way from point a to b will require the throttleblades wide open. The only time you want to baby the throttle is during take off. Its best to use both feet (one on gas and one on brake) and rev up till your brakes won't hold you back anymore and stay there till the green. When green hits, you finish flooring it and let of the brake. That way you start the race at a higher rpm than idle. This will hurt your drivetrain however. And on the whole manual shifting an auto....you can hold it out longer but if you decide by looking at your dynosheets that its better to shift early....even when upshifting, the truck will still pull in the orginal gear till its ready to shift.
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slow2dak
Dodge Dakota
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2/04/2003
14:35:45
|  RE: Racing...
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i am a DC tech and have been a drag racer for a long time. i have been racing since 1994 and i am only 22. in an automatic car or truck, holding the brakes against the convertor does nothing but superheat the fluid and adds heat to the motor. the best on only way to get a good reaction time, keep heat out of the motor, and get a good 60' is by shocking the convertor. if you hold your RPM's at the highest point where your tires are about to spin, your wasting your time. stock convertors dont have a very high stall. what i mean by shocking it is by keeping your rpm's below the convertors stall point. that way when you hammer the throttle you still have some slip left in your convertor. if you dont want to worry about spinning, by all means go get a set of sticky street tires or some slicks. also, dont let off of the gas when your making a pass, no throttle means no power and you dont go any faster and by letting off the throttle and then shifting and back into the throttle will decrease trans performance and its lifespan. leave the damn thing in "D" and just get after it. play with your launch technique and it will benefit you on the big end of the track.
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